Computation & Study On Settlement Law And Consolidation In The Vacuum-Heaped Load Combining Pre-compression

The quality requirement is very high on expressway soft foundation improvement Compared to the super pre-loading and the Jet-Powder pile, the Vacuum-Heaped Load Combining Pre-compression is cheaper and its intensify effect is distinct. In order to search after its applying to expressway roadbed improvement, this paper studied consolidation characteristic and distortion law hi soft soil under positive and negative action, introducing parse explain and numerical calculation theory.Additionally, based on locale experimentation, the design and construction method of VHLCP was implemented and its reinforce effect and economical character was estimated. Testing indicated that the groundwork's intensity have increased 97%,silt soil have vanished and outlay have saved 39%.In the same time, this paper applied the plane strain FEM based on Biot theory to analyzed calculated result and observation information hi scene.Finally ,this paper put forward a settlement forecast model based on the modified GAOMUJUNJIE method , using by inversion analysis theory to compare and analyze the settlement process of VHLCP. Result indicated that the model inosculated with the fact data and the consolidation degree have finished 86%, back-work settlement was 87mm. These data satisfied expressway quality requirement.